Growing Help.....

I bought this AeroGarden for $20 and figured id give it a try and its working good but im having a problem with some leaves drying up, and others with a lot of little dry spots on them, its only about 8inches tall and both bottom sets of leaves dried up and fell off and the 3rd row of leaves are covered in dry spots, but top leaves look nice. Any thoughts? I thought it was maby from humidity because my house has central air and its 24/7 air conditioned, but i tryed opening some windows and the humidity went up to 32% from 16% but still having the same problem. If anyone has any ideas thanks.

I was just reading around and had another question, all my leaves are 3 fingered any reason for that? that normal? and also im doing 16/8 lighting it that right or should i change it?

do you know the pH of your nutirent solution? That's a hydro setup- is this your first grow?

not sure of the ph the kit came with a supply of nutrents. yea this is my 1st try at growing

pics of them

one the aerogrow website it says :""""Time released aeroponics nutrients deliver a balanced blend of 85 macro and micro nutrients for optimal plant growth. Aero Grow patent-pending pH balancing system automatically adjusts pH. Drop in a tablet when the AeroGarden Smart Garden Control Panel reminds you - about every two weeks.

Aerogrow nutrient tablets consist mainly of mineral salts and provide the 13 micro and macro nutrients that all plants require in the right proportions for growing Basil in a container garden. The Aerogarden tablets also contain:
Seaweed for 70 additional micro nutrients
A pH balancing tap water buffer
And a binder to hold the tablet together. """"

I STEPED ON THE BAG WITH THE NUTRIENT TABS IN IT AND ITS ALL BROKEN TABLETS, COULD THAT BE WHY THE LEAVES ARE DIEING? SINCE THERE TIME RELEASED AND IT HAS A PH BALANCE IN IT?